Wiktionaryβ

一鸣惊人

For pronunciation and definitions of一鸣惊人– see 一鳴驚人 (“to amaze the world with a single brilliant feat; to become famous overnight; to set the world on fire; No one was expecting much and then with one act, everybody was amazed; a bolt from the blue”).
(This term, 一鸣惊人, is the simplified form of 一鳴驚人.)